Everyone says turbo cars are more tunable but don't really understand. Take for example the coupe Turbo and coupe 2.2. As standard the Turbo is a lot faster but by adding a turbo to the 2.2 would this not make it faster than the 2.0 turbo? Then once the 2.2 has got its turbo, it would be open to mods like the 2.0 hence they will be equally tunable.
I know there is more to it than what I've described but that's what I understand at the moment. Some please educate me